Contents  on 12 February '18

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 12 February '18

Eight objects reported inside ten LD

Eight minor objects are reported inside ten lunar distances (LD) of Earth today. Nearest is 2018 CH2, which is coming its closest to Earth this time around, reaching 2.04 LD at 1748 UTC within Earth's SOI.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.18 LD Feb. 9 2018 CB 22 m  3.05 to 4.51 LD Feb. 3 - 16 intruder, NHATS target
0.9   LD Feb. 15* 2018 CD3 7 m  4.9 from 6.6 LD Feb. 9 - 21 NEW, EPU +/- 14 mins.*, intruder - MPEC
2.04 LD today 2018 CH2 8 m  2.04 LD Feb. 7 - 17 Earth closest at 1748 UTC
2.23 LD Feb. 15 2018 CU2 9 m  4.87 from 6.70 LD Feb. 10 - 20 NEW - MPEC
5.31 LD Feb. 4 2018 AH12 14 m  9.86 to 10.82 LD Jan. 28 - today NHATS target, exits ten LD
5.65 LD yesterday 2018 CX 31 m  5.66 to 6.29 LD Feb. 8 - 15
6.50 LD yesterday 2018 CB2 35 m  6.72 to 8.31 LD Feb. 9 - 13
6.66 LD Jan. 15 2018 AV2 6 m  7.81 to 7.90 LD Nov. 10 - March 2 NHATS target, natural?

This report was generated at 1918 UTC with the discoveries of inbound objects 2018 CU2 (MPEC) and intruder 2018 CD3 (MPEC), and of departed 2018 CC3 (MPEC), which went by us at 7.04 LD on February 7th. Today's DOU MPEC has follow-up for approaching objects 2018 CB1 and 2018 CJ and for distant objects 450894 2008 BT18 and 2009 BE58 (adding 48.62 days to the 0.03-day recovery arc).

Approaching Traffic - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
9.62 LD Feb. 15 2018 CB1 27 m  11.13 from 12.62 LD Feb. 14 - 16 DOU
6.08 LD Feb. 19 2018 CP2 46 m  18.20 from 20.62 LD Feb. 16 - 22
3.7   LD Feb. 24* 2017 DR109 10 m  19.0 from 20.7 LD Feb. 18 - March 1 EPU +/- 30 mins.*, NHATS target
9.26 LD Feb. 20 2018 CJ 63 m  26.97 from 30.30 LD Feb. 19 - 21 DOU
3.76 LD March 7 2017 VR12 267 m  31.20 from 32.54 LD Feb. 28 - March 13 radar/NHATS target
6.9   LD March 10* 2015 DK200 26 m  47.9 from 50.0 LD March 6 - 14 EPU +/- 23.45 hours*, NHATS target
* EPU = Earth passage uncertainty


Reading:  Queens University Belfast has a news item out today noting the publication of a science paper (DOI, preprint) on the tumbling motion of 1I/`Oumuamua (A/2017 U1) (more links).



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. "Distant" is used here to describe objects that have approached Earth within ten LD since A/CC began these traffic reports eleven years ago but are not currently coming so close. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 12 February '18

The MPC's NEO Confirmation Page has 88 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 88 objects listed. Of these, 56 were "one nighters." So far The Tracking News has counted a total of 110 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 12 February '18

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been nineteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2018-C97 - "16:03 UT" - 2018 CG3


MPEC 2018-C96 - "16:00 UT" - 2018 CE3


MPEC 2018-C95 - "15:56 UT" - 2018 CW2


MPEC 2018-C94 - "15:52 UT" - 2018 CH3


MPEC 2018-C93 - "15:48 UT" - 2018 CF3


MPEC 2018-C92 - "15:45 UT" - 2018 CD3


MPEC 2018-C91 - "15:42 UT" - 2018 CC3


MPEC 2018-C90 - "15:38 UT" - 2018 CB3


MPEC 2018-C89 - "15:34 UT" - 2018 CA3


MPEC 2018-C88 - "15:28 UT" - 2018 CZ2


MPEC 2018-C87 - "15:24 UT" - 2018 CY2


MPEC 2018-C86 - "15:19 UT" - 2018 CX2


MPEC 2018-C85 - "15:14 UT" - 2018 CV2


MPEC 2018-C84 - "15:09 UT" - 2018 CU2


MPEC 2018-C83 - "15:05 UT" - 2018 CT2


MPEC 2018-C82 - "15:00 UT" - 2018 CS2


MPEC 2018-C81 - "14:55 UT" - 2018 CR2


MPEC 2018-C80 - "14:50 UT" - 2018 CQ2


<< DOU on 12 Feb. '18 >>  MPEC 2018-C79 - "13:05 UT" - Daily Orbit Update

Observers  on 12 February '18

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 3 in MPEC 2018-C79 -- 505657, 276033, 6053
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2018-C79 -- 2018 BX2, 2018 BV1, 2018 AF4, 2017 WN28, 2014 VU1
T05ATLAS Haleakala in Hawaii, 5 in MPEC 2018-C79 -- 36284, 259802, 6053, 3122, 1864
T08ATLAS Mauna Loa in Hawaii, 20 in MPECs 2018-C79 & 2018-C87 -- 2018 CY2, 2018 CJ, 2017 XB2, 2017 SL33, 2008 DG17, 509353, 495848, 436325, 411201, 348314, 333888, 311554, 162038, 154652, 153349, 14402, 142040, 140039, 136793, 1980
160Castelmartini Obs. in Italy, 10 in MPEC 2018-C79 -- 2016 BA39, 505657, 385580, 348314, 333888, 17511, 12711, 8037, 7977, 1980
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2018-C79 & 2018-C87 -- 2018 CY2, 2016 BA39, 2015 NJ3, 508871, 450894, 331510, 27346, 190208, 163692, 162011, 152952, 7977, 6053
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPECs 2018-C80 & 2018-C82 -- 2018 CS2, 2018 CQ2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2018-C79 -- 2017 YZ1, 2017 YP8, 2017 YG7, 2017 YA2, 2017 XG62, 2017 XF62
K65Cesena Obs. in Italy, 1 in MPEC 2018-C87 -- 2018 CY2
734Farpoint Obs. in Kansas, 2 in MPECs 2018-C90 & 2018-C94 -- 2018 CH3, 2018 CB3
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2018-C87 & 2018-C88 -- 2018 CZ2, 2018 CY2
203GiaGa Obs. in Italy, 2 in MPECs 2018-C87 & 2018-C91 -- 2018 CY2, 2018 CC3
J95Great Shefford Obs. in England, 10 in MPECs 2018-C83, 2018-C84, 2018-C86, 2018-C87, 2018-C91, 2018-C92, 2018-C93, 2018-C95, 2018-C96 & 2018-C97 -- 2018 CY2, 2018 CX2, 2018 CW2, 2018 CU2, 2018 CT2, 2018 CG3, 2018 CF3, 2018 CE3, 2018 CD3, 2018 CC3
238Grorudalen Obs. in Norway, 1 in MPEC 2018-C79 -- 508912
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2018-C87 -- 2018 CY2
Z43Landehen Obs., 5 in MPEC 2018-C79 -- 2017 SR32, 508912, 190208, 7977, 6053
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2018-C80, 2018-C81, 2018-C82, 2018-C84 & 2018-C86 -- 2018 CX2, 2018 CU2, 2018 CS2, 2018 CR2, 2018 CQ2
711McDonald Obs. in Texas, 2 in MPECs 2018-C80 & 2018-C83 -- 2018 CT2, 2018 CQ2
474Mt. John Obs. in New Zealand, 6 in MPECs 2018-C79 & 2018-C87 -- 2018 CY2, 2018 CB1, 2017 YZ1, 2017 YR1, 2017 YC8, 2017 VU14
G96Mt. Lemmon Survey (MLS) in Arizona, 30 in MPECs 2018-C79, 2018-C80, 2018-C81, 2018-C82, 2018-C83, 2018-C84, 2018-C85, 2018-C86, 2018-C89, 2018-C90, 2018-C91, 2018-C92, 2018-C93, 2018-C95, 2018-C96 & 2018-C97 -- 2018 CX2, 2018 CW2, 2018 CV2, 2018 CU2, 2018 CT2, 2018 CS2, 2018 CR2, 2018 CQ2, 2018 CG3, 2018 CF3, 2018 CE3, 2018 CD3, 2018 CC3, 2018 CB3, 2018 CA3, 2017 QL33, 2016 BA39, 2015 NJ3, 2015 FO124, 2012 PC20, 2009 BE58, 68278, 512245, 509935, 509192, 386847, 385497, 331510, 219527, 6053
Z80Northolt Branch Obs. in England, 2 in MPECs 2018-C79 & 2018-C87 -- 2018 CY2, 505657
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2018-C79 -- 7977
I41Palomar Transient Factory in southern California, 1 in MPEC 2018-C88 -- 2018 CZ2
F51Pan-STARRS 1 (PS1) in Hawaii, 19 in MPECs 2018-C79, 2018-C80, 2018-C88 & 2018-C94 -- 2018 CZ2, 2018 CY, 2018 CQ2, 2018 CH3, 2017 XL62, 2011 EB7, 2009 HB82, 2002 PO75, 506437, 495323, 424482, 31346, 303248, 204232, 162038, 154656, 152563, 10145, 3551
K63Pascoli Obs. in Italy, 1 in MPEC 2018-C87 -- 2018 CY2
B49Paus Obs. in Spain, 1 in MPEC 2018-C87 -- 2018 CY2
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2018-C83, 2018-C87, 2018-C91 & 2018-C95 -- 2018 CY2, 2018 CW2, 2018 CT2, 2018 CC3
204Schiaparelli Obs. in Italy, 6 in MPECs 2018-C83, 2018-C84, 2018-C87, 2018-C88, 2018-C91 & 2018-C95 -- 2018 CZ2, 2018 CY2, 2018 CW2, 2018 CU2, 2018 CT2, 2018 CC3
W88"program code '"' (11) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2018-C87 -- 2018 CY2
587Sormano Obs. in Italy, 5 in MPECs 2018-C83, 2018-C87, 2018-C88, 2018-C91 & 2018-C95 -- 2018 CZ2, 2018 CY2, 2018 CW2, 2018 CT2, 2018 CC3
L06Sormano2 Obs. in Italy, 1 in MPEC 2018-C87 -- 2018 CY2
Q21Southern Utsunomiya in Japan, 1 in MPEC 2018-C79 -- 2008 DG17
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2018-C79 -- 2018 CW, 2018 AF4, 2014 BR8
I52Steward Obs. Mt. Lemmon Station in Arizona, 19 in MPECs 2018-C79, 2018-C80, 2018-C81, 2018-C82, 2018-C83, 2018-C84, 2018-C85, 2018-C86, 2018-C87, 2018-C88, 2018-C89, 2018-C90, 2018-C91, 2018-C92, 2018-C93, 2018-C95 & 2018-C96 -- 2018 CZ2, 2018 CY2, 2018 CX2, 2018 CW2, 2018 CV2, 2018 CU2, 2018 CT2, 2018 CS2, 2018 CR2, 2018 CQ2, 2018 CF3, 2018 CE3, 2018 CD3, 2018 CC3, 2018 CB3, 2018 CA3, 2018 BJ3, 2018 AF4, 2018 AE2
L01Visnjan Obs., 15 in MPECs 2018-C80, 2018-C81, 2018-C82, 2018-C83, 2018-C84, 2018-C85, 2018-C86, 2018-C88, 2018-C89, 2018-C90, 2018-C91, 2018-C93, 2018-C95, 2018-C96 & 2018-C97 -- 2018 CZ2, 2018 CX2, 2018 CW2, 2018 CV2, 2018 CU2, 2018 CT2, 2018 CS2, 2018 CR2, 2018 CQ2, 2018 CG3, 2018 CF3, 2018 CE3, 2018 CC3, 2018 CB3, 2018 CA3
718Wiggins Obs. in Utah, 1 in MPEC 2018-C87 -- 2018 CY2
C42Xingming Obs. in China, 2 in MPECs 2018-C83 & 2018-C88 -- 2018 CZ2, 2018 CT2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 February '18

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2018 CKNEODyS17002066-209381.28e-07-7.48-7.640NEODyS: "Based on 27 optical observations (of which 2 are rejected as outliers) from 2018-02-04.421 to 2018-02-10.323."
2017 WT28NEODyS17002080-21161204.17e-04-5.27-5.620NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2017-11-28.291 to 2017-12-16.266."
2017 TD6NEODyS17002081-209122.71e-08-8.82-8.950NEODyS: "Based on 96 optical observations (of which 0 are rejected as outliers) from 2017-10-11.413 to 2017-10-19.529."
2016 WGNEODyS17002076-2115436.47e-06-4.28-4.920NEODyS: "Based on 137 optical observations (of which 13 are rejected as outliers) from 2016-11-11.310 to 2016-11-25.873."
2015 XQ129NEODyS1700R E M O V E D-
2015 WN1NEODyS17002051-21161008.19e-05-4.97-5.290NEODyS: "Based on 45 optical observations (of which 7 are rejected as outliers) from 2015-11-18.300 to 2015-12-04.297."
2013 HT150NEODyS17002039-2116661.17e-05-5.18-5.510NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2013-04-16.337 to 2013-04-19.208."
2012 VS76NEODyS17002081-2115116.12e-06-6.43-6.580NEODyS: "Based on 65 optical observations (of which 5 are rejected as outliers) from 2012-11-13.362 to 2012-11-16.294."
2011 OB26NEODyS17002090-2117734.7e-05-4.90-5.120NEODyS: "Based on 30 optical observations (of which 2 are rejected as outliers) from 2011-07-28.474 to 2011-08-07.523."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 12 February '18

Times are UTC for when items were noted or added by The Tracking News.

1918Generated Traffic Report
1700Noted that NEODyS has updated its 2011 OB26 risk assessment - see above
Noted that NEODyS has updated its 2012 VS76 risk assessment - see above
Noted that NEODyS has updated its 2013 HT150 risk assessment - see above
Noted that NEODyS has updated its 2015 WN1 risk assessment - see above
Noted that NEODyS has removed 2015 XQ129 as an impact risk - see above
Noted that NEODyS has updated its 2016 WG risk assessment - see above
Noted that NEODyS has updated its 2017 TD6 risk assessment - see above
Noted that NEODyS has updated its 2017 WT28 risk assessment - see above
Noted that NEODyS has updated its 2018 CK risk assessment - see above
Grabbed MPEC 2018-C79 - Daily Orbit Update - see above
Grabbed MPEC 2018-C80 - 2018 CQ2 - see above
Grabbed MPEC 2018-C81 - 2018 CR2 - see above
Grabbed MPEC 2018-C82 - 2018 CS2 - see above
Grabbed MPEC 2018-C83 - 2018 CT2 - see above
Grabbed MPEC 2018-C84 - 2018 CU2 - see above
Grabbed MPEC 2018-C85 - 2018 CV2 - see above
Grabbed MPEC 2018-C86 - 2018 CX2 - see above
Grabbed MPEC 2018-C87 - 2018 CY2 - see above
Grabbed MPEC 2018-C88 - 2018 CZ2 - see above
Grabbed MPEC 2018-C89 - 2018 CA3 - see above
Grabbed MPEC 2018-C90 - 2018 CB3 - see above
Grabbed MPEC 2018-C91 - 2018 CC3 - see above
Grabbed MPEC 2018-C92 - 2018 CD3 - see above
Grabbed MPEC 2018-C93 - 2018 CF3 - see above
Grabbed MPEC 2018-C94 - 2018 CH3 - see above
Grabbed MPEC 2018-C95 - 2018 CW2 - see above
Grabbed MPEC 2018-C96 - 2018 CE3 - see above
Grabbed MPEC 2018-C97 - 2018 CG3 - see above